Areas like hospitals, offices, schools and colleges often need these devices because these areas require silent environments and petrol pump needs them because the battery of mobile phones can easily catch fire and with petrol it makes a dangerous combination so it is always safe not to use mobile phones in this area. In Delhi, these products are widely available because people are learning to understand its needs and advantages. These are available reasonable prices so that the places which need them can easily afford it as it is a necessary device in some key places.
Uses & Advantages
It can be used in schools to prevent the use of mobile phones among children.
It can be used in hospitals so that no patients are disturbed by noise and the doctors and nurses can work without getting distracted.
It can be used in examination centers to prevent the examinees from cheating.
It can be used by spies and detectives in their missions to disable the communication process of the opponents.